Experimental analysis of clinical applicability of homemade in homogeneous phantom
10.13491/j.issn.1004-714X.2022.05.016
- VernacularTitle:非均匀自制模体的临床可应用性实验分析
- Author:
Jingjing CHEN
1
;
Honglin CHEN
2
;
Dehong YU
1
Author Information
1. Department of Radiotherapy, Pizhou People's Hospital, Xuzhou 221300 China.
2. Department of Radiotherapy, Xuzhou Cancer Hospital , Xuzhou 221005 China.
- Publication Type:Journal Article
- Keywords:
Phantom;
Dose verification;
Tissue equivalent;
Radiation therapy;
CT value
- From:
Chinese Journal of Radiological Health
2022;31(5):606-610
- CountryChina
- Language:Chinese
-
Abstract:
Objective To conduct experimental analysis of clinical applicability of a homemade phantom which is equivalent to multiple tissue densities of human body. Methods Materials with densities close to bone, lung, cavity, and soft tissue were manufactured and combined to obtain a homemade in homogeneous phantom. The electron density of equivalent materials was compared with the organs. Ten lung cancer patients in our department were recruited for dose verification of intensity modulated radiation therapy in the homemade phantom and solid-water phantom. The two phantoms were compared for characteristics in dose verification, and the dosimetric differences of the homemade phantom between the calculated values on treatment planning systemand measured values were statistically analyzed by SPSS 21.0 software. Results In the dose verification, the gamma pass rates (3 mm/3%) were more than 90% using both the homemade phantom and solid-water phantom. The measured values in homemade phantom were larger than those in solid-water phantom, and the maximum deviation was 11.5%. The AD and RD values of gamma pass rate in dose verification showed no significant differences between the two phantoms (P > 0.05). Conclusion The homemade phantom meets the accuracy requirement of clinical application and can be used in dose verification of intensity modulated radiation therapy plan.
